strongswan: DHCP on lo fixes backport #21675

Job	Run time
Feeds Package Test Build / Test aarch64_generic	23m 50s
Feeds Package Test Build / Test arm_cortex-a15_neon-vfpv4	21m 54s
Feeds Package Test Build / Test arm_cortex-a9_vfpv3-d16	20m 39s
Feeds Package Test Build / Test i386_pentium-mmx	21m 41s
Feeds Package Test Build / Test mips_24kc	22m 5s
Feeds Package Test Build / Test mipsel_24kc	22m 30s
Feeds Package Test Build / Test powerpc_464fp	23m 23s
Feeds Package Test Build / Test powerpc_8548	21m 38s
Feeds Package Test Build / Test riscv64_riscv64	22m 38s
Feeds Package Test Build / Test x86_64	23m 20s
	3h 43m 38s

Provide feedback